Preliminary findings on diagnostic performance of computed tomography perfusion images for intracranial arterial stenosis: a retrospective study

Table 1 Correlation coefficients (R) between readers’ interpretation and DSA results

Radiologist	Images	ICA N = 42	MCA N = 42	ACA N = 42	VA N = 52	BA N = 26	PCA N = 52
R1	CTA	0.665*	0.811*	0.455*	0.355*	0.799*	-0.103 (0.47)
R1	CTA + CTP	0.786*	0.812*	0.689*	0.398*	0.782*	0.059 (0.68)
R2	CTA	0.575*	0.802*	0.281	0.354*	0.832*	-0.103 (0.47)
R2	CTA + CTP	0.760*	0.908*	0.689*	0.501*	0.817*	0.069 (0.63)

DSA, digital subtraction angiography; ICA, internal carotid artery; MCA, middle cerebral artery; ACA, anterior cerebral artery; VA, vertebral artery; BA, basilar artery; PCA, posterior cerebral artery; CTA, computed tomographic angiography; CTP, computed tomographic perfusion
Values in parentheses are p-values. *p < 0.05 indicating the significance of the correlation. Correlation coefficient strength was characterized as follows: weak (0.1 ≤ R < 0.3), moderate (0.3 ≤ R < 0.7), relatively high (0.7 ≤ R < 0.9), and very high (R ≥ 0.9)

ISSN: 1471-2377